I am not going to delve too much into the history, as there are already many sources for such information out there.
We know this region in general was of importance to the Native Americans who originally inhabited the area; chanting is still heard in the nearby woods to this day. There are stories of gruesome murders, which occurred at the hands of two ruthless brothers known for hijacking stagecoaches in the mid 1800s. Also nearby was a hanging tree where many innocent, and possibly not so innocent people met with an untimely death. The tree was struck by lightning several years ago and is no longer standing.
Flash forward to the 1970s when the Dandy family moved in. Their issues within the home became so terrifying Father Alphonsus, a priest and family friend from St. Bonaventure University decided to exorcise the home as a last resort. Sadly things worsened and the family eventually fled in 1974.
Available books on the subject:
Echoes of a Haunting - Revisited by Clara Miller
Hinsdale House an American Haunting by Daniel Klaes and Tim Joyce
You Know They're Here by Paul J. Kenyon
Links:
Haunted Hinsdale House webpage
Hinsdale House Facebook Page